Insulator



Get. 28, 1930. STEINMAYER 1,779,501

. I N SULATOR Filed Jan. 25, 1926 @Mlfeg}.

EEEEEEEEQ Patented Get. 28, 1939 UNITED STATES PATENT OFFICE ALWIN G. STEINMAYER, OF MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MEN'IS, TO LINE MATERIAL COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A GOR- I'ORATION OF DELAWARE INSULATOR Application filed January 25, 1926. Serial No. 83,603.

This invention relates-to certain new and useful improvements in insulators of that type commonly known as house brackets to which multitudinous uses have been assigned.

Heretofore, insulators of this type have been provided with screws or other holding means embedded in a recess formed in the insulator and secured therein by cementing or other like means. This construction while providing a ready means of attachment is incapable of withstanding the various stresses applied thereto, and, therefore, one of the objects of this invention is the provision of an insulator having means for attachment to a support whereby the insulator will be capable of withstanding relatively greater stresses applied thereto.

Another object of this invention resides in the provision of an insulator having a securing means whereby, upon attachment of the insulator to a support, the porcelain thereof is maintained under compression at all times.

It is a further object of this invention to provide an insulator having a holding or mounting screw so connected therew1th as to serve as a reenforcing meansfor the insulator.

This invention has as a further object the provision of an insulator having means to draw the porcelain tight against the support to thus eliminate all bending stresses of the screw.

And a still further object of this invention is to provide an appliance of the class described which is of simple and durable con struction.

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have sofar deyised for the practical application of the principles thereof, and in which:

Figure 1 is a perspective View of one corner portion of a building showing the manner of applying my improved insulator;

Figure 2 is a side elevation of an insulator embodying my invention, and

F1gure 3 is a sectional view taken through F igure 2 011 the plane of the line 3-3.

Referring now more particularly to the accompany ng drawing, in which like numerals designate like parts throughout the several views, the numeral 5 designates a building having the usual overhanging rafters 6 and while my improved device is illustrated as applied to a house installation, it will be apparent that it may be employed in any other type of installation.

In some installations, it is customary and sometimes necessary to run the wire under the eaves and through insulators or brackets 7 secured to the building. An additional and excess strain in a sidewise direction is thereby applied to the insulator under the eaves, which in the drawing is shown as fastened to the under side of one rafter. This is one instance where my improved bracket is better adapted to withstand such strain.

Each insulator or bracket 7 consists of a member 8 of porcelain or other insulating mater al preferabl of square cross section to facilitate thread ing of its holding means into the support and having a transverse bore or opening 9 through which the line or the tie w re may be passed. In a plane at substantially right angles to the axis of the bore 9, and concentric therewith, the member 8 is provided with an exterior annular channel 10 interrupted by a continuation of the side and bottom of the porcelain, as at 11.

A fastening means 12 consisting of a rod having an insulator engaging portion 13 and a threaded end 14 has its portion 13 engaged in the channel 10 by being bent thereabout to form a loop. The other threaded end 14 of the fastening means is extended from the base 1 5 of the porcelain in line with the longitudinal axis of the insulator as illustrated.

It will be noted that the fastening means arraeoa or holding screw substantially surrounds the bore 9 thereby greatly reinforcing the porcelain; also the channel 10 is of a depth reater than the diameter oithe member l2 w ereby the possibility of the tie wire or line comlng in contact with metal is avoided. The square cross section of the insulator and its base portion 15 of relatively large area allows the v screw to be readily threaded into its support and'the porcelain to be pulled ti ht thereagainst. This relieves the screw 0 all bending stresses and puts the porcelain in constant compression.

What I claim as my invention is:

1. An appliance of the class described, comprising an lnsulating member havin a transverse bore and an annular channe concentrio with the bore and interrupted at one point a mounting member, and means carried by the mounting member and non-detachably secured in the channel for connecting the mounting member with the insulating member with its attaching portion axial thereto and for maintaining the insulating member in compression upon its attachment to a sunport by the mounting member.

1 2L An appliance of the character described, fco'mprising an insulating member of approximately polygonal cross section haviinig (a transverse bore, a substantially flat base and an annular channel concentric with and substantially encircling the bore and interrupted at one point, and a mounting member having a loop portion engaged in the channel and a threaded portion extended laterally from the loop portion and projectin axially to and beyond the insulating mem er base to be screwed into a support to draw the inr sulator base thereagainst and eliminate bending strains in the threaded extension.

3. An appliance of the character described, comprising an insulating member having a transverse bore, a substantially flat base and an annular channel concentric with and substantlally encircling the bore and interrupted at one point, and a mounting member having a loop portion engaged in the channel and a threaded portion extended laterally from the loop portion and projecting beyond the insulatingmember base to be screwed 1nto a support to draw the insulator base thereagainst and eliminate bending strains in the threaded extension, the -outer end of the mounting member loop portion being spaced from the threaded lateral portion at its point of juncture with the loop portion to receive the portion of the insulating member interrupting the channel to hold the mounting member against turning and present its disengagement from the insulating member.

' In testimony whereof I affix my signature. ALWIN Gr. STEINMAYER.

CERTIFICATE OF CORRECTION. 3

Patent No. l, 779, 50L Granted October 28., 1930, to

'ALWIN c. STEINMAYER It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, lines 59 and 60 claim 3, for-the word "present" read prevent; and that the said Letters Patent shouid be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of December. A. D. 1930.

M. J. Moore,

(Seal) Acting Commissioner of Patents. 

